I don't know if anyone has heard about the automatic JDM SIR b18c motor cams are smaller lift since it doesn't rev higher then 7000 rpm. I find this to be true because i bought an automatic jdm gsr motor and replaced tranny with a usdm one and after 7500 rpm car sounds like its valve floating and making no power at all. So friend has a set of stock b16 cams sitting in my basement and i want to swap the cams out.. you guys think it will stop the valve floating since b16 cams stock make power up to 7600-7900 rpm or will i also need to change my valve springs/retainers?

 

Um, wow. B18C's are B18C's it doesn't matter if you buy one with an auto tranny or manual tranny. A month ago I bought a 96 JDM b18c longblock from torontojdm.com, I drove up there to pick it up, I asked to remove the valve cover to check for sludge and **** and they removed 3 covers on 3 engine and let me pick. 2 were autos and 1 was manual. They all looked the same as for as valve train components, the guy there also said they're all the same except for the type of tranny that it had. I picked the a auto one, because I new it probably wasn't redlined and beat to hell like a manual engine would. I highly doubt honda made/desigened different cams for the auto GSR.

And your valves aren't floating!!?? I never drove a car with a auto b-series. SO i wouldn't know how the car performs in the higher rpm range. B16 cams won't do anything for you, both b18c's and b16s rev to 8200 and the GSR cams are better then a b16 cams anyway, people who don't wanna spend alot of money on cams buy GSR cams to make alittle more power in their b16's.

 

yeah but problem is.. when i hit vtec which my ecu is set w/ skunk2 manifold 5800 rpm and i shift at 8000 rpm i land back at 6500 rpm. But when i redline at 7500 RPM i still land back at 6500 RPM without dropping out of vtec.. in most case it should drop out of vtec. The car feels like its not making power after 7000 rpm its weird.

 

You sir need to educate yourself mr. honda driver. There are differences between cams. Just as b16 auto cams are super weak, so are the b18c auto cams. Oh, and through the dynos I have seen, gsr cams give no whatsoever more performance than b16 cams do. That's a fairytale. I have driven an automatic bseries motor and I have felt the difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridmiklo &raquo;</TD></TR><TR><TD CLASS="quote">You sir need to educate yourself mr. honda driver. There are differences between cams. Just as b16 auto cams are super weak, so are the b18c auto cams. Oh, and through the dynos I have seen, gsr cams give no whatsoever more performance than b16 cams do. That's a fairytale. I have driven an automatic bseries motor and I have felt the difference. </TD></TR></TABLE>


so for sure there is a difference between auto/manual.

i already had a feeling the cams are smaller then manual transmission. Reason why i mentioned b16 cams is because they came off my friends 99-00 SI when he replaced his with CTR cams and I'm sure they're better then the ones i have under my valve cover (auto cams).

 

with a smaller/ auto cam y does it sound like the valve are floating at 7k? does this mean the valve springs are softer then a stick motor? my motor wont make that sound till about 8,500 rpm and its a usdm b16. does it sound like valve float because the cams are small? that doesnt make sence to me, im thinking the springs and retainers are also weaker/ not as strong?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridmiklo &raquo;</TD></TR><TR><TD CLASS="quote">You sir need to educate yourself mr. honda driver. There are differences between cams. Just as b16 auto cams are super weak, so are the b18c auto cams. Oh, and through the dynos I have seen, gsr cams give no whatsoever more performance than b16 cams do. That's a fairytale. I have driven an automatic bseries motor and I have felt the difference. </TD></TR></TABLE>

That doesn't make sense, are there specs of auto b16 and b18 cams being weaker then manual ones. . I never seen oem cams sold, on here or ebay labled as Auto b16 cams or auto GSR cams. The cams are cams. If an auto GSR has weaker cams and is sold at a dealership new, wouldn't the hp number have to be lower then off a manual GSR. And I highly doubt its enough to make a noticeable difference. I couldn't compare my b16 engine to the stock auto gsr engine cause as soon as i got the motor i replaced the cams. The difference you felt driving an auto b18c was probably the **** box tranny. If its a fairy tale ( which I don't care) why do i read post On HT about people installing GSR cams in their b16's. And b18c GSR cams are alittle more aggressive than b16. Not much but they are. I would never waste time putting in GSR cams into a b16, nor advise any too but I was letting the OP know that he better off keeping his GSR cams in!


Modified by hondadriver at 5:02 AM 9/5/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RED_90TEG &raquo;</TD></TR><TR><TD CLASS="quote">with a smaller/ auto cam y does it sound like the valve are floating at 7k? does this mean the valve springs are softer then a stick motor? my motor wont make that sound till about 8,500 rpm and its a usdm b16. does it sound like valve float because the cams are small? that doesnt make sence to me, im thinking the springs and retainers are also weaker/ not as strong?</TD></TR></TABLE>


good question.

 

i think the cams are the same and the difference is the springs due to the fact that the tranny does the shifting for you and you dont have to worry about over revving.
if you think your valves are floating get new springs. a so called bigger cam wont stop them from floating. that would only make it worse.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BILLETGRIP &raquo;</TD></TR><TR><TD CLASS="quote">i think the cams are the same and the difference is the springs due to the fact that the tranny does the shifting for you and you dont have to worry about over revving.
if you think your valves are floating get new springs. a so called bigger cam wont stop them from floating. that would only make it worse.</TD></TR></TABLE>


if it feels like and stops making power after 7500 rpm i think the cams are smaller.. the larger cams are the more power it makes higher rpm. i don't know wtf im going to do for now.

 

i had a similar problem - my gsr sounded like it was popping but it really wasnt, when i got the vtec wired right the motor really started popping - is your engine light on ????

 

There really is a difference between the cams. THere was even a discussion about it on ht. Search for it, If i remember it was about auto b16 cams. I know there is a difference. When I had an auto 1st gen b16 I put down 135. With no other changes just manual cams i got 144. I am not trying to upset no one or make false comments. What I have noticed is that with auto motors I have had problems with my lmas sticking and making loud ticking noises when you put larger valvetrain and cams. This happened to my 2nd gen b16 when I put in skunk2 stage 2s. But this ticking started happening after time.

 

as for gsr cams . . .

https://honda-tech.com/zerothread/1113834

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridmiklo &raquo;</TD></TR><TR><TD CLASS="quote">There really is a difference between the cams. THere was even a discussion about it on ht. Search for it, If i remember it was about auto b16 cams. I know there is a difference. When I had an auto 1st gen b16 I put down 135. With no other changes just manual cams i got 144. I am not trying to upset no one or make false comments. What I have noticed is that with auto motors I have had problems with my lmas sticking and making loud ticking noises when you put larger valvetrain and cams. This happened to my 2nd gen b16 when I put in skunk2 stage 2s. But this ticking started happening after time.

</TD></TR></TABLE>


mine ticks already. i think it needs a valve adjustment. not sure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HOTjdmEG6 &raquo;</TD></TR><TR><TD CLASS="quote">i had a similar problem - my gsr sounded like it was popping but it really wasnt, when i got the vtec wired right the motor really started popping - is your engine light on ????</TD></TR></TABLE>

no. lol